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v3.20.4

Credit Facilities, Long-Term Debt and Lease Liabilities - Senior Notes (Details) $ in Millions, $ in Millions | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2018 USD ($) | Dec. 31, 2018 CAD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2020 CAD ($) | Oct. 22, 2020 | Dec. 31, 2019 USD ($) | Dec. 31, 2019 CAD ($) | Jul. 20, 2018
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Interest rate |  |  |  |  | 4.07% |  |  | 4.509%
Borrowings |  |  |  | $ 3,361 |  |  | $ 3,212 |
Long-term debt | Net investment hedges |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Notional amount |  |  | $ 370 |  |  | $ 370 |  |
Senior notes | Minimum |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Interest rate |  |  | 4.50% | 4.50% |  |  |  |
Senior notes | Maximum |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Interest rate |  |  | 6.50% | 6.50% |  |  |  |
6.65% Senior notes, due May 2018 |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Interest rate | 6.65% |  |  |  |  |  |  |
Borrowings | $ 500 |  |  |  |  |  |  |
Redemption of noncurrent borrowings | $ 516 | $ 617 |  |  |  |  |  |
Redemption of prepayment premium recognized in net interest expense |  | 5 |  |  |  |  |  |
Accrued and unpaid interest |  | $ 14 |  |  |  |  |  |

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